sub AddSceneSkyBox( img_top, img_bottom, img_left, img_right, img_front, img_back)
sub AddSceneSkyDome( img )
sub AddSceneSkyDomeEx( img, horiRes, vertRes, txPercentage, spherePercentage, radius)
sub RemoveSceneSky( )
sub SetWorld3DMaxSubSteps( steps )
sub SetWorld3DTimeStep( ts )
function GetWorld3DMaxSubSteps()
function GetWorld3DTimeStep()
Sub SetSceneFog(color, fog_type, start_val, end_val, density, pixelFog, rangeFog)
Sub GetSceneFog(ByRef color, ByRef fog_type, ByRef start_val, ByRef end_val, ByRef density, ByRef pixelFog, ByRef rangeFog)
Sub ClearScene()
